Year	current US$
1960	131731862.78301702
1961	151675738.92634198
1962	166521239.65024328
1963	172233430.65785843
1964	185693724.90523335
1965	198318064.02892432
1966	220613581.97260103
1967	237397428.1350098
1968	251247457.7655245
1969	265040036.41721454
1970	274960699.8852549
1971	322128018.9554444
1972	410669263.651798
1973	541973362.6104233
1974	585364634.4739771
1975	767102680.2399669
1976	754549601.3914917
1977	765224029.2865564
1978	878771772.2021489
1979	1198749667.4292345
1980	1705796852.8947349
1981	1993512322.6239107
1982	2160640564.560407
1983	2097274289.7506616
1984	2193581365.342988
1985	2160872540.0317497
1986	1849268212.302843
1987	2297753652.3492937
1988	2212536311.9931903
1989	2389593025.603387
1990	2798746050.1135387
1991	2724853505.8033624
1992	2933222703.0334044
1993	2684323623.1437206
1994	1769365437.7880118
1995	2116003867.75536
1996	2540697539.0577264
1997	2322719102.6908984
1998	1949481379.2195134
1999	2354772960.282964
2000	3227927697.5792117
2001	2796704604.038123
2002	3034250923.977265
2003	3503723087.7448316
2004	4656974940.127209
2005	6650001680.4854355
2006	8072305029.065143
2007	8782703436.701883
2008	11649857673.443577
2009	9723299915.25312
2010	13148396211.595518
2011	15655383576.651531
2012	17692911296.304386
2013	17958720699.086823
2014	17919321082.553932
2015	12434793867.722769
2016	10931328149.685734
2017	11834473047.763565
2018	14773900277.922077
2019	13976637328.847435
2020	11468688140.722488
2021	14825690210.030796
2022	15817030156.945892
2023	15321055818.326313